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EP0285452A3 - Magnetic disk apparatus using both servo-surface servo and data-surface servo - Google Patents

Magnetic disk apparatus using both servo-surface servo and data-surface servo Download PDF

Info

Publication number
EP0285452A3
EP0285452A3 EP88302970A EP88302970A EP0285452A3 EP 0285452 A3 EP0285452 A3 EP 0285452A3 EP 88302970 A EP88302970 A EP 88302970A EP 88302970 A EP88302970 A EP 88302970A EP 0285452 A3 EP0285452 A3 EP 0285452A3
Authority
EP
European Patent Office
Prior art keywords
servo
data
magnetic disk
disk apparatus
positioning information
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP88302970A
Other languages
German (de)
French (fr)
Other versions
EP0285452A2 (en
Inventor
Shunji Kitamura
Tomihisa Ogawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Publication of EP0285452A2 publication Critical patent/EP0285452A2/en
Publication of EP0285452A3 publication Critical patent/EP0285452A3/en
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • G11B19/28—Speed controlling, regulating, or indicating
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/596—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks
    • G11B5/59633—Servo formatting
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/596—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks

Landscapes

  • Moving Of The Head To Find And Align With The Track (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

Disclosed is a magnetic disk apparatus which prepares data-surface positioning information in accordance with a positioning information read out from a servo surface by a servo head (1), and provides a mode of writing the positioning information on a data surface by means of a read/write head.
EP88302970A 1987-03-31 1988-03-31 Magnetic disk apparatus using both servo-surface servo and data-surface servo Ceased EP0285452A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP77866/87 1987-03-31
JP62077866A JPS63244382A (en) 1987-03-31 1987-03-31 Magnetic disk device

Publications (2)

Publication Number Publication Date
EP0285452A2 EP0285452A2 (en) 1988-10-05
EP0285452A3 true EP0285452A3 (en) 1990-06-13

Family

ID=13645974

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88302970A Ceased EP0285452A3 (en) 1987-03-31 1988-03-31 Magnetic disk apparatus using both servo-surface servo and data-surface servo

Country Status (3)

Country Link
EP (1) EP0285452A3 (en)
JP (1) JPS63244382A (en)
KR (1) KR880011772A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5307218A (en) * 1987-03-31 1994-04-26 Kabushiki Kaisha Toshiba Magnetic disk apparatus using both servo-surface servo and data-surface servo
JP2893752B2 (en) * 1989-09-29 1999-05-24 ソニー株式会社 Disk-shaped recording medium
JP2653933B2 (en) * 1991-04-30 1997-09-17 富士通株式会社 Offset detection method for magnetic disk drives
US5347410A (en) * 1991-04-30 1994-09-13 Fujitsu Limited Sensitivity correcting circuit of servo signal detection on data surface and offset measuring circuit in magnetic disk unit
CN1041357C (en) * 1991-05-10 1998-12-23 华中理工大学 Servo-coding circuit for clocked recording and reduplication writing
US5297024A (en) * 1992-12-01 1994-03-22 Sgs-Thomson Microelectronics, Inc. Voice coil driver with variable gain in seek and track-follow modes
US5500776A (en) * 1993-12-16 1996-03-19 Seagate Technology, Inc. Self-calibration for computer disk read/write offsets

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985005720A1 (en) * 1984-06-04 1985-12-19 Dma Systems Corporation Servo pattern

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55108969A (en) * 1979-02-14 1980-08-21 Fujitsu Ltd Servo signal detection system
JPS56134365A (en) * 1980-02-14 1981-10-21 Mitsubishi Electric Corp Recording system for head positioning information
JPS59112468A (en) * 1982-12-16 1984-06-28 Fujitsu Ltd Controlling system for position of magnetic head
JPS60177485A (en) * 1984-02-22 1985-09-11 Fujitsu Ltd Position information forming
JPS61172282A (en) * 1985-01-28 1986-08-02 Seiko Epson Corp Servo system for magnetic disc
JPS63104276A (en) * 1986-10-21 1988-05-09 Seiko Epson Corp Magnetic recording device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985005720A1 (en) * 1984-06-04 1985-12-19 Dma Systems Corporation Servo pattern

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 26 (P-245)(2083) 31 January 1986, & JP-A-60 177 485 (FUJITSU) 11 September 1985. *
PATENT ABSTRACTS OF JAPAN vol. 10, no. 382 (P-529)(2439) 20 December 1986, & JP-A-61 172 282 (SEIKO EPSON) 2 August 1986. *
PATENT ABSTRACTS OF JAPAN vol. 4, no. 160 (P-35)(642) 8 November 1980, & JP-A-55 108 969 (FUJITSU) 21 August 1980. *
PATENT ABSTRACTS OF JAPAN vol. 8, no. 237 (P-310)(1674) 30 October 1984, & JP-A-59 112 468 (FUJITSU) 28 June 1984. *

Also Published As

Publication number Publication date
JPS63244382A (en) 1988-10-11
KR880011772A (en) 1988-10-31
EP0285452A2 (en) 1988-10-05

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